This library is the first of the addwiki collection that has actually reached 1.0.0 let alone 2.0.0! All of the other libraries, including wikibase-api and mediawiki-api are still a work in progress with lots to be added. The next likely to be released will be the wikibase-api library once I try to also add async functionality there!

A snippet of the async functionality added in mediawiki-api-base can be seen below: